C&C Wind Reduction and Directionality Factor
C&C Wind Reduction and Directionality Factor
(OP)
Per IBC 2009 I may reduce the wind load on C&C to 0.7W per footnote f of Table 1604.3.
Per ASCE 7, Wind load is calculated using a directionality factor Kd (0.85 in my case), but is only permitted if using load cases in section 2.
D + 0.7W isn't a load case in section 2.
1) Therefore would you use the directionality factor of 0.85 in conjunction with the 0.7 factor for determining C&C deflection due to wind?
2) Does anyone know if this 0.7 reduction is acceptable to use with cfsf studwalls supporting brick veneer?
Thanks
Per ASCE 7, Wind load is calculated using a directionality factor Kd (0.85 in my case), but is only permitted if using load cases in section 2.
D + 0.7W isn't a load case in section 2.
1) Therefore would you use the directionality factor of 0.85 in conjunction with the 0.7 factor for determining C&C deflection due to wind?
2) Does anyone know if this 0.7 reduction is acceptable to use with cfsf studwalls supporting brick veneer?
Thanks





RE: C&C Wind Reduction and Directionality Factor
http://www.eng-tips.com/viewthread.cfm?qid=265671
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.